In December of 2017 I was working on a Java EE web project from my startup.
One of the first things that needed to be defined was where to host the application.
After studying Heroku, Openshift, AWS and Google Cloud, I decided to use Docker containers on Google Cloud infrastructure.

Google Cloud with Docker container lets you use all the power of the Java EE stack. It has low prices, ease of configuration, scalability and platform independence.

As it was a private project, I chose to use Bitbucket because it has Git and pepilines to do the integrations with Google Cloud and Slack.

The following are the settings required to run the continuous integration and continuous deployment pipelines:

At the root of the Java project two files are required:

/Dockerfile

/bitbucket-pipelines.yml

You must add three Environment variables:

Go to your repository settings in Bitbucket and navigate to Pipelines > Environment variables. Create a new variable named GCLOUD_API_KEYFILE and paste the encoded service account credentials in it.

Add a new variable called GCLOUD_PROJECT and set the value to the key of your Google Cloud project.